Ghazi Emir Jennings's answer to Jonathan's Primary 4 Science Singapore question.

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Ghazi Emir Jennings
Ghazi Emir Jennings's answer
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1st
Q is incorrect because the rib cage does not protect *only* the heart, it protects all internal organs within the abdomen (heart, lungs etc).

Since Q is wrong, by elimination the only answer is (1)